PMID: 9430533Jan 16, 1998Paper

Genus-specific detection of alphaviruses by a semi-nested reverse transcription-polymerase chain reaction

The American Journal of Tropical Medicine and Hygiene
M PfefferO R Kaaden

Abstract

A reverse transcription-polymerase chain reaction (RT-PCR) was developed for the genus-specific detection of alphaviruses. Based on the available published sequences, degenerate primers were designed to ensure hybridization to a conserved region within the nonstructural protein 1 gene of all alphavirus species. The expected 434-basepair (bp) cDNA fragment was amplified from all 27 alphavirus species by using RNA extracted from 200 microl of infected cell culture supernatant. In addition, eight strains of Venezuelan equine encephalitis (VEE) virus and 10 strains of Sindbis virus were amplified. The viral origin of the amplicons was confirmed by restriction enzyme analysis and comparison with the expected cleavage pattern based on published sequence data. The PCR products of alphavirus species with thus far unknown nucleotide composition were sequenced. About 120 nucleotides downstream of the forward primer, a region showing sufficient homology for the design of another forward primer was found and used in a semi-nested PCR. The expected 310-bp semi-nested fragment was demonstrated for all viruses investigated. The sensitivity of the RT-PCR was about 1,200 plaque-forming units (PFU) for VEE virus reference strain Trinidad donkey....Continue Reading

Citations

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